Agent

Jeff Zyfai

mainnet|id 9750|owner 0x4fa20dfb4a0b2957f1e746babbf7e283bd1e66af

Checks 1–7

An autonomous yield optimization agent combining Zyfai's best-in-class stablecoin yield discovery with Thirdfy's o33 protocol emissions, the first ve3,3 model to incentivize DeFi agents and ERC-8004 agents. Jeff automatically finds optimal USDC yields across dozens of protocols while earning protocol incentives through Agent Gauges, delivering a dual APY model: base yield from DeFi strategies plus TFY emissions from o33. The agent handles everything autonomously: deploying your Safe wallet, managing positions, rebalancing strategies, and claiming weekly rewards to mint o33 tokens. Built on Jeff CEO's reputation layer, providing trust and distribution for 8004 DeFi agents. Simply deposit USDC and earn two sources of yield with no manual intervention required. Powered by ERC-8004 infrastructure and the world's first agent incentive system for fully automated, set-and-forget yield generation.

Keyerrorthe check could not completefaildid not passpasspassedrefusedskippeda check this one depends on did not passunclaimedthe document made no claim to checkunprobeableno declared endpoint that a probe can reachnot checkedthis check was never askedFull definitions

The seven checks, with their evidence

7 recorded

Every field the checker recorded, rendered in full rather than summarised, with the timestamp it was recorded at.

Registered?rung 1 · registered
pass
The agent exists in the on-chain registry, with an owner and a document URL.
passed
block_number
25723900
chain_id
1
owner
0x4fa20dfb4a0b2957f1e746babbf7e283bd1e66af
registry
0x8004a169fb4a3325136eb29fa0ceb6d2e539a432
token_id
9750
tx_hash
0xb676a5263d6ba2377c8ad55a7e539a317681568bd8c7d5bc6eb79a4f346e1caf
checked at 2026-08-10T10:31:46.403784Z
Reachable?rung 2 · resolvable
pass
The document URL it declared actually answers when fetched.
passed
bytes
2305
data_uri_variant
base64
inline
true
scheme
data
uri
data:application/json;base64,ewogICJ0eXBlIjogImh0dHBzOi8vZWlwcy5ldGhlcmV1bS5vcmcvRUlQUy9laXAtODAwNCNyZWdpc3RyYXRpb24tdjEiLAogICJuYW1lIjogIkplZmYgWnlmYWkiLAogICJkZXNjcmlwdGlvbiI6ICJBbiBhdXRvbm9tb3VzIHlpZWxkIG9wdGltaXphdGlvbiBhZ2VudCBjb21iaW5pbmcgWnlmYWkncyBiZXN0LWluLWNsYXNzIHN0YWJsZWNvaW4geWllbGQgZGlzY292ZXJ5IHdpdGggVGhpcmRmeSdzIG8zMyBwcm90b2NvbCBlbWlzc2lvbnMsIHRoZSBmaXJzdCB2ZTMsMyBtb2RlbCB0byBpbmNlbnRpdml6ZSBEZUZpIGFnZW50cyBhbmQgRVJDLTgwMDQgYWdlbnRzLiBKZWZmIGF1dG9tYXRpY2FsbHkgZmluZHMgb3B0aW1hbCBVU0RDIHlpZWxkcyBhY3Jvc3MgZG96ZW5zIG9mIHByb3RvY29scyB3aGlsZSBlYXJuaW5nIHByb3RvY29sIGluY2VudGl2ZXMgdGhyb3VnaCBBZ2VudCBHYXVnZXMsIGRlbGl2ZXJpbmcgYSBkdWFsIEFQWSBtb2RlbDogYmFzZSB5aWVsZCBmcm9tIERlRmkgc3RyYXRlZ2llcyBwbHVzIFRGWSBlbWlzc2lvbnMgZnJvbSBvMzMuIFRoZSBhZ2VudCBoYW5kbGVzIGV2ZXJ5dGhpbmcgYXV0b25vbW91c2x5OiBkZXBsb3lpbmcgeW91ciBTYWZlIHdhbGxldCwgbWFuYWdpbmcgcG9zaXRpb25zLCByZWJhbGFuY2luZyBzdHJhdGVnaWVzLCBhbmQgY2xhaW1pbmcgd2Vla2x5IHJld2FyZHMgdG8gbWludCBvMzMgdG9rZW5zLiBCdWlsdCBvbiBKZWZmIENFTydzIHJlcHV0YXRpb24gbGF5ZXIsIHByb3ZpZGluZyB0cnVzdCBhbmQgZGlzdHJpYnV0aW9uIGZvciA4MDA0IERlRmkgYWdlbnRzLiBTaW1wbHkgZGVwb3NpdCBVU0RDIGFuZCBlYXJuIHR3byBzb3VyY2VzIG9mIHlpZWxkIHdpdGggbm8gbWFudWFsIGludGVydmVudGlvbiByZXF1aXJlZC4gUG93ZXJlZCBieSBFUkMtODAwNCBpbmZyYXN0cnVjdHVyZSBhbmQgdGhlIHdvcmxkJ3MgZmlyc3QgYWdlbnQgaW5jZW50aXZlIHN5c3RlbSBmb3IgZnVsbHkgYXV0b21hdGVkLCBzZXQtYW5kLWZvcmdldCB5aWVsZCBnZW5lcmF0aW9uLiIsCiAgImltYWdlIjogImh0dHBzOi8vYmxvYi44MDA0c2Nhbi5hcHAvMzAyOGJkZGEyM2E2YWQ1YzE2ZWI3NDQwZmI5ZTE1ZTliZjQ0ZmVlOGE0MzFkZmNmYThhNDYwYmJkM2QxMjJmOC5qcGciLAogICJzZXJ2aWNlcyI6IFsKICAgIHsKICAgICAgIm5hbWUiOiAiY3VzdG9tIiwKICAgICAgImVuZHBvaW50IjogImh0dHBzOi8vYXBpLnRoaXJkZnkuY29tL2FwaS92MS9hZ2VudHMvamVmZi16eWZhaS9kZXBvc2l0L2ludGVudCIKICAgIH0sCiAgICB7CiAgICAgICJuYW1lIjogImN1c3RvbSIsCiAgICAgICJlbmRwb2ludCI6ICJodHRwczovL2FwaS50aGlyZGZ5LmNvbS9hcGkvdjEvYWdlbnRzL2plZmYtenlmYWkvc3RhdHVzIgogICAgfSwKICAgIHsKICAgICAgIm5hbWUiOiAiY3VzdG9tIiwKICAgICAgImVuZHBvaW50IjogImh0dHBzOi8vYXBpLnRoaXJkZnkuY29tL2FwaS92MS9hZ2VudHMvamVmZi16eWZhaS9vcHBvcnR1bml0aWVzIgogICAgfSwKICAgIHsKICAgICAgIm5hbWUiOiAiT0FTRiIsCiAgICAgICJlbmRwb2ludCI6ICJodHRwczovL2dpdGh1Yi5jb20vYWdudGN5L29hc2YvIiwKICAgICAgInZlcnNpb24iOiAidjAuOC4wIiwKICAgICAgInNraWxscyI6IFsKICAgICAgICAidG9vbF9pbnRlcmFjdGlvbi93b3JrZmxvd19hdXRvbWF0aW9uIiwKICAgICAgICAidG9vbF9pbnRlcmFjdGlvbi90b29sX3VzZV9wbGFubmluZyIKICAgICAgXSwKICAgICAgImRvbWFpbnMiOiBbCiAgICAgICAgInRlY2hub2xvZ3kvYmxvY2tjaGFpbi9kZWZpIiwKICAgICAgICAidGVjaG5vbG9neS9ibG9ja2NoYWluL2Jsb2NrY2hhaW4iLAogICAgICAgICJ0ZWNobm9sb2d5L2Jsb2NrY2hhaW4vY3J5cHRvY3VycmVuY3kiLAogICAgICAgICJ0ZWNobm9sb2d5L2Jsb2NrY2hhaW4vc21hcnRfY29udHJhY3RzIgogICAgICBdCiAgICB9LAogICAgewogICAgICAibmFtZSI6ICJBMkEiLAogICAgICAiZW5kcG9pbnQiOiAiaHR0cHM6Ly9hcGkudGhpcmRmeS5jb20vLndlbGwta25vd24vYWdlbnQtY2FyZC5qc29uIiwKICAgICAgInZlcnNpb24iOiAiMC4zLjAiLAogICAgICAiYTJhU2tpbGxzIjogWwogICAgICAgICJ0b29sX2ludGVyYWN0aW9uL3dvcmtmbG93X2F1dG9tYXRpb24iCiAgICAgIF0KICAgIH0KICBdLAogICJyZWdpc3RyYXRpb25zIjogW10sCiAgInN1cHBvcnRlZFRydXN0cyI6IFsKICAgICJyZXB1dGF0aW9uIiwKICAgICJjcnlwdG8tZWNvbm9taWMiLAogICAgInRlZS1hdHRlc3RhdGlvbiIKICBdLAogICJhY3RpdmUiOiB0cnVlLAogICJ4NDAyc3VwcG9ydCI6IHRydWUKfQ==
checked at 2026-08-10T10:31:46.403784Z
Readable?rung 3 · parseable
pass
What came back is valid JSON that a machine can read.
passed
body_bytes
2305
body_sha256
8d004fa42376203610e9dda396a3f7f11be30bd22b7176eae148ebd79c6227c8
content_type
—
checked at 2026-08-10T10:31:46.403784Z
Follows the spec?rung 4 · conformant
pass
The document meets what ERC-8004 requires of it.
passed
both_fields_present
false
legacy_endpoints_field
false
may_gaps
x402Support, supportedTrust
must_violations
(empty)
registrations_checked
0
services_field_source
services
services_status
present
should_gaps
services[].version, registrations
spec_commit
68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-08-10T10:31:46.403784Z
Claims its identity?rung 5 · bound
unclaimed
The document names the on-chain agent it belongs to, rather than leaving it unsaid.
unclaimed — the document made no claim to check
declared_agent_id
—
declared_chain
—
declared_registry
—
match
—
reason
unclaimed
registrations_seen
0
checked at 2026-08-10T10:31:46.403784Z
Answers?rung 6 · live
pass
A declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
passed
endpoints
{"declared":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/deposit/intent","elapsed_ms":895,"final_url":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/deposit/intent","http_status":404,"index":0,"kind":"https","name":"custom","outcome":"not_live","probed":true,"probed_url":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/deposit/intent"}, {"declared":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/status","elapsed_ms":885,"final_url":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/status","http_status":404,"index":1,"kind":"https","name":"custom","outcome":"not_live","probed":true,"probed_url":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/status"}, {"declared":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/opportunities","elapsed_ms":1131,"final_url":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/opportunities","http_status":410,"index":2,"kind":"https","name":"custom","outcome":"not_live","probed":true,"probed_url":"https://api.thirdfy.com/api/v1/agents/jeff-zyfai/opportunities"}, {"declared":"https://github.com/agntcy/oasf/","elapsed_ms":1975,"final_url":"https://github.com/agntcy/oasf/","http_status":200,"index":3,"kind":"https","name":"OASF","outcome":"live","probed":true,"probed_url":"https://github.com/agntcy/oasf/"}, {"declared":"https://api.thirdfy.com/.well-known/agent-card.json","elapsed_ms":686,"final_url":"https://api.thirdfy.com/.well-known/agent-card.json","http_status":200,"index":4,"kind":"https","name":"A2A","outcome":"live","probed":true,"probed_url":"https://api.thirdfy.com/.well-known/agent-card.json"}
endpoints_answered_not_live
3
endpoints_declared
5
endpoints_live
2
endpoints_our_error
0
endpoints_payment_gated
0
endpoints_probeable
5
endpoints_probed
5
endpoints_refused
0
checked at 2026-08-10T11:57:37.277100Z
Has feedback?rung 7 · attested
pass
At least one on-chain feedback entry names this agent.
passed
distinct_authors
10
feedback_count
10
checked at 2026-08-10T10:31:46.403784Z

On-chain snapshot

mainnet

token id: 9750
owner: 0x4fa20dfb4a0b2957f1e746babbf7e283bd1e66af
block: 25,723,900
observed: 2026-08-10T10:31:46.407307Z

tokenURI

data:application/json;base64,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

What the fetch saw

data

scheme: data
request url: —
final url: —
http status: —
content type: —
size: 2,305 bytes
sha256: 8d004fa42376203610e9dda396a3f7f11be30bd22b7176eae148ebd79c6227c8
elapsed: 0 ms

This run

reproducible

Every status above is scoped to this sweep, at this block. Rerun it and you should get these answers back.

run: 15744566-e63c-4814-85ca-c900b4c09cff
chain: mainnet
pinned block: 25,723,900
agents: 49,501
started: 2026-08-10T10:09:00.141614Z
finished: 2026-08-10T11:31:56.201501Z
checker: 0.7.0 · 55deaa9ce71c025a9199311a53cdc2de236eae53
spec commit: 68fc6765761a10fb26f0692df21c8a6f9d12b1be

Reproduce

cargo run -p sweeper -- mainnet   # at block 25723900

What each check measures →

The seven checks, with their evidence

Registered?rung 1 · registered

Reachable?rung 2 · resolvable

Readable?rung 3 · parseable

Follows the spec?rung 4 · conformant

Claims its identity?rung 5 · bound

Answers?rung 6 · live

Has feedback?rung 7 · attested

On-chain snapshot

What the fetch saw

This run